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數學方程式
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One number is 18 greater than another number. If the samller number is subracted from three times the greater number , the result is 78. Find the sum oof two numbers.
最佳解答:
let the smaller number be x,then the greater number=x+18 3(x+18)-x=78 3x+54-x=78 2x+54=78 2x=24 x=12 sum of two numbers=12+(12+18) =42
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